Shaping Life: Genes, Embryos and Evolution

by John Maynard Smith

Book Overview

During the past ten years, there has been a revolution in our understanding of developmental biology, as scientists apply the ideas and techniques of genetics and embryology to the processes of... This description may be from another edition of this product.

• Format: Hardcover
• Language: English
• ISBN: 0300080220
• ISBN13: 9780300080223
• Release Date: October 1999
• Publisher: Yale University Press
• Length: 64 Pages
• Weight: 0.40 lbs.
• Dimensions: 0.4" x 4.8" x 7.3"

Customer Reviews

Biologists ignore Darwin at their peril

In this lecture, J. M. Smith explains clearly the differences and the links between evolution, development, self-organization and reproduction. Although there is a parallelism between the development changes that convert an egg into an adult and the evolutionary changes that converted single-celled ancestors into the existing array of multi-cellar animals and plants, these mechanism are entirely different: the development changes are not driven by natural selection. Development depends on genetic information accumulated during millions of years of evolution. The evolution of adult forms, however, depends on development changes in successive generations. Changes in genes cause changes in morphology, but during the evolution, it is not the form (morphology), but the information that is conserved (the regulatory genes that act as signals inducing structures to develop at particular places). Nonetheless, there is a necessary link between development and evolution. Development is modular and evolution proceeds by modifying the later development stages of a module. E.g., the embryo is successively divided into smaller and smaller regions, whose growth is to a degree autonomous. So, changes in one module become possible without the necessity to alter every part. The basis of heredity is template (stamp) reproduction, not self-organizing structures, because the latter cannot ensure their own survival and reproduction. This small book is a must read for all those interested in basic biology and evolution.

A Quickstart to the central issues in developmental biology

I was prompted to write this after reading the review below from the New Mexico reader. He misses the point, not Maynard-Smith. This little book (45 pages)is based on a lecture given by Smith at the London School of Economics. The central theme of his lecture was to make the point that the two views in developmental biology i.e. dynamic-holistic view and the local-reductionist view are both important. But, he extends this thinking by suggesting that this dichotomy in biology is a pattern that exists in all aspects/spheres/disciplines in life. This is what I found so revealing. Gore Vs Bush could not be a better (current) example that comes to mind when reading the final chapter 5 - Reductionists to the right, Holists to the left.